For me it's extremely early to judge whether the audio signature of the Mark Audio is to my taste or not.
GM's proposal is something like this ?
An excellent hiding place for my 3,5 y.o. little son toys ! The baffle thickness has to be at least 18mm. It will need extremely strong bracing to avoid resonance. So with a baffle width 21cm the depth will be 30,8 !!!
It is bigger than an A4 page. Unpractical .
Thank you very much for the offer but....
Elias
Attachments
No, +6 dB peaking referenced to a 5 W input, the practical Xmax limit. Fb = Fs.
You must install HR to import the file to view the sim.
You're welcome!
Understood, but this sim was to address any perceived/stated (mid) bass preference(s) in a much smaller variant of BLH it ideally needs 'to be all it can be'.
Regardless, in these types of meandering threads I generally post more to the (lurking/searching) masses, especially in ones like this where folks seem to want/'demand' '10 lbs in a 2 lb box'. 😉
Other than Marks' ? CSS EL70, FR125, no 'wondering' for me based on specs in general and some early Jim Griffin MLTL auditions in large, highly resonant rooms.
You're welcome!
Size is relative; to me its a floor lamp base. 😉 But I've been fortunate to having relatively large rooms for my entire adult life.
When going low though, 'BIB' (bigger is better) rules! 🙂 Can't fool 'Mother Nature'!
Right, the minimum I recommend for most cab alignments regardless of size.
Such high aspect ratio cabs are like cylinders, so acoustically very strong along its axial length, requiring minimal ~ full length bracing (board on edge) and only one horizontally behind the driver(s) to do double duty mass loading the driver(s) plus either double top, bottom plates or angle board on edge bracing if singles.
Same cab 'shrunk' to T/S max flat alignment size is 15.15 L with Fb = Fs with basically little/no useful (mid) bass unless jammed in a corner. 106.24 cm^2 (i.d.) = ~10.31 cm square, so now small enough for your son/pet to knock it over if not on/in a substantial base, so might wind up with ~the same size footprint as the full size model. 🙁
Red trace +4 dB peaking referenced to a 14 W input.
edit: Note both cabs are inside dimensions (i.d.) based on 0.75"/1.8 cm no void plywood or similar.
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I didn't have the time to read 661 pages. What is IIRC or who is ?
Thanks in advance.
For the moment I am here http://www.mh-audio.nl/Calculators/standingwaveinbox.html
Elias
That one is useful. It could also be used to get resonant frequencies of a stiff, doorless, window-less rectangular room.
dave
dave
If I Recall Correctly. You can search it for finding out how to use HR in Linux.
GM, how is the effect when using a large box?
Does the driver tolerate less power?
I have only built small boxes for my drivers.
Does the driver tolerate less power?
I have only built small boxes for my drivers.
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Not sure what you mean by 'tolerate', but as the posted power plots show, the greater the box acoustic efficiency, the greater the peak SPL in its Fs - Fhm = [2*Fs/Qts'] BW for a given power output.
[Qts']: [Qts] + any added series resistance [Rs]: http://www.mh-audio.nl/Calculators/newqts.html
Hmm, my sim was strictly to optimize bchang's sim to be closer to measurements, so please define 'improve' since one has to use less damping, so likely bigger and more optimal driver, vent offset to audibly improve it. Also, it's Xmax limited to ~10 W/< ~150 Hz with the CHP90.